Air trapping on expiratory high-resolution CT scans in the absence of inspiratory scan abnormalities: correlation with pulmonary function tests and differential diagnosis.

Publisher Website
Google Scholar
Abstract
We wish to describe the differential diagnosis and pulmonary function correlates of patients with normal findings on inspiratory high-resolution CT (HRCT) scans who showed air trapping on expiratory scans.HRCT scans in 273 consecutive patients with suspected diffuse lung disease were reviewed. HRCT consisted of inspiratory scans at 1- to 2-cm intervals and expiratory scans at three levels. Studies considered to show expiratory air trapping were divided into two groups, one having normal findings on inspiratory scans and one having abnormal findings on inspiratory scans. Pulmonary function test results in these groups were compared with a group of patients who had normal findings on inspiratory and expiratory HRCT scans.Forty-five patients showed air trapping on expiratory HRCT scans. Of these 45 patients, inspiratory high-resolution CT scans showed abnormal findings in 36 (bronchiectasis, bronchiolitis obliterans, asthma, chronic bronchitis, and cystic fibrosis). In the remaining nine patients, inspirator...

This publication has 0 references indexed in Scilit: